Sheet material



FIG. 1 is a top plan view of sheet material showing the new design, wherein the bottom plan view appears the same;

FIG. 2 is a top, front, side perspective view thereof, wherein the same view from the opposite side appears the same;

FIG. 3 is a top, front perspective view thereof, wherein the same view from the rear appears the same; and,

FIG. 4 is a top, side perspective thereof, wherein the same view from the opposite side appears the same. 

CLAIM The ornamental design for sheet material, as shown and described. 